Rumer Willis -- I'm Ready to Party Again

Rumer Willis

I'm Ready to Party Again

1/30/2012 7:01 AM PST BY TMZ STAFF

Rumer Willis returned to the Hollywood party scene last night ... slinking into a SAG Awards after-party just 6 days after her mother partied her way into the hospital last week.

Rumer -- who was at her mom's home when Demi went into a semi-conscious, convulsive state last Monday -- was seen entering the legendary Chateau Marmont hotel on the Sunset Strip last night ... by herself.